apache/arrow

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Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

Stars: 17.1k
Forks: 4.3k
Open beginner issues: 0
Indexed issues: 2.2k
Avg merge: 3d 13h
Merged PRs (30d): 88

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

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2160 open issues indexed

[Python] Table.to_pandas() fails for dictionary encoded columns with an is_null partition_expression Open

Component: C++ Component: Python Type: bug

apache/arrow#32225 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Reconsider filesystem equality Open

Component: C++ Type: task

apache/arrow#32247 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Results of running a substrait plan against a tpch data table written into parquet are all null Open

Component: Python Type: bug

apache/arrow#32296 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] dplyr queries create locks on FileSystemDataset files Open

Component: R Type: bug

apache/arrow#32315 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][R] GcsFilesystem can appear to hang for non permanent errors Open

Component: Python Component: R Type: bug

apache/arrow#32332 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add RLE benchmarks Open

Component: C++ Type: task

apache/arrow#32337 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Reading and Writing RLE data from/to Parquet Open

Component: C++ Component: Parquet Type: task

apache/arrow#32339 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Docs][C++] Guide to to work with RLE data (in kernels?) Open

Component: C++ Component: Documentation Type: task

apache/arrow#32340 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add GCS connection pool size option Open

Component: C++ good-first-issue Type: enhancement

apache/arrow#20314 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] temporal addition and subtraction with integers Open

Component: C++ Type: task

apache/arrow#32352 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Update make_date, make_datetime, ISOdate and ISOdatetime to use `tz` Open

Component: R Status: needs champion Type: enhancement

apache/arrow#32361 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Timezone aware parquet read with schema and filters Open

Component: Parquet Component: Python Type: bug

apache/arrow#32366 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Substrait] Acero consumer is unable to consume count function from substrait query plan Open

Component: Python Type: bug

apache/arrow#32369 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Python hangs when use pyarrow.fs.copy_files with "used_threads=True" Open

Component: Python Type: bug

apache/arrow#32372 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Unicode character issue with pyarrow Open

Component: Python Type: bug

apache/arrow#32384 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Add translation for dplyr::na_if() Open

Component: R Type: task

apache/arrow#32397 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][R] copy_files() does not take paths to specific files Open

Component: C++ Component: R Type: enhancement

apache/arrow#20324 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Data race between future signalling and destruction Open

Component: C++ Type: bug

apache/arrow#32426 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] HadoopFileSystem open_append_stream throwing an error if file does not exists Open

Component: C++ good-first-issue Type: bug

apache/arrow#32438 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Compilation warnings on gcc in release mode Open

Component: C++ Type: bug

apache/arrow#32445 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Expand C++ Cookbook Open

Component: C++ Component: Documentation Type: task

apache/arrow#32465 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Re-Organize the Existing Acero Streaming Engine Documentation Open

Component: C++ Component: Documentation Type: task

apache/arrow#20334 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Show examples of multiple Acero-compatible language APIs Open

Component: C++ Component: Documentation Type: task

apache/arrow#32477 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Verify Completeness of API Reference Open

Component: C++ Component: Documentation Type: task

apache/arrow#32481 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Create a Fetch Node Open

Type: task

apache/arrow#32484 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] Create Documentation for Fetch Sink Node Open

Type: task

apache/arrow#32489 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Is any plan to develop 'utf8_slice_charunits' like existed 'utf8_slice_codeunits' Open

apache/arrow#13701 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Potential memory leak at shutdown if an exec plan with a scanner fails or is aborted immediately before shutdown Open

Component: C++ Type: bug

apache/arrow#20338 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Cannot override environmental variables setting AWS S3 region Open

Component: R Type: task

apache/arrow#32493 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][CI] Occasional timeout failures on arrow-compute-scalar-test Open

Component: C++ Type: bug

apache/arrow#32496 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R] Removing files after reading them in R Open

Component: R Type: bug

apache/arrow#32497 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs][Benchmarking] Add info about the use of benchmarking hooks on the PR Open

Component: Benchmarking Component: Documentation good-first-issue Type: enhancement

apache/arrow#32503 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
read_parquet super slow Open

apache/arrow#13720 · 9 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Holder instances are returned with null buffer Open

apache/arrow#13721 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] group_by functionality directly on large dataset, instead of on a table? Open

apache/arrow#13747 · 15 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Release] Java jars verification pass despite that nothing has been uploaded Open

Component: Developer Tools Type: bug

apache/arrow#32542 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to save org.apache.arrow.vector.VectorSchemaRoot into parquet file in Java API Open

apache/arrow#13759 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Create fragment scanners for csv/parquet/orc/ipc Open

Component: C++ Type: task

apache/arrow#32566 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Release] Update remove old artifacts release script Open

Component: Developer Tools Type: bug

apache/arrow#32572 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Vendor backward for better stack traces Open

Component: C++ Type: bug

apache/arrow#32588 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[cpp][parquet] Segmentation fault when open parquet file Open

apache/arrow#13801 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Get the table schema as json? Open

apache/arrow#13803 · 9 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Parquet should be listed in PyArrow's get_libraries() function Open

Component: Python Type: bug

apache/arrow#32603 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Unsupported cast using function cast_struct Open

Component: C++ Type: bug

apache/arrow#32607 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Type checking support Open

Component: Python Type: enhancement

apache/arrow#32609 · 39 comments · 28 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] ORC in build breaks code using Arrow and not ORC -- not reproducible Open

Component: C++ Type: bug

apache/arrow#32618 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to read a subset of columns from arrow ipc format file the fastest way? Open

apache/arrow#13827 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Arrow Flight memory management Open

apache/arrow#13837 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Create installation instructional documentation in Sphinx Open

Component: C++ Component: Documentation Type: task

apache/arrow#32647 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Docs] Create a 10 minutes to Arrow article Open

Component: C++ Component: Documentation Type: task

apache/arrow#32648 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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